I have to say that, of course, with a caveat. You have to do it carefully and strategically. Most people are risk averse, which means that they play it quite safe and they don't explore as widely around their assumptions, or their mental models, as they perhaps should. Organizations exacerbate this because they reward people for results most of the time, and not so often on good intentions or good process for exploration. If your intention is to change a business model or if you're in a new environment, I think you should have more tolerance for mistakes than is typically the case in companies.